3 papers
astro-ph2002
X-ray emission from old and intermediate age brown dwarfs
B. Stelzer, R. Neuhaeuser
According to the paradigm of solar-type dynamo action brown dwarfs should not exhibit magnetic activity as they are fully convective. Indeed, Halpha observations of ultracool field…
astro-ph2000
X-ray flares on zero-age- and pre-main sequence stars in Taurus-Auriga-Perseus
B. Stelzer, R. Neuhaeuser, V. Hambaryan
We present results of a systematic search for X-ray flares on young stars observed during ROSAT PSPC observations of the Taurus-Auriga-Perseus region. All pointed PSPC observations…
astro-ph1999
ROSAT PSPC observations of T Tauri stars in MBM12
T. Hearty, R. Neuhauser, B. Stelzer +4
We present the ROSAT PSPC pointed and ROSAT All-Sky Survey (RASS) observations and the results of our low and high spectral resolution optical follow-up observations of the T Tauri…